#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <assert.h>
int mystrlen(char* a)
{
	assert(a != '\0');
	int count = 0;
	while (*a != '\0')
	{
		a++;
		count++;
	}
	return count;
}
int main()
{
	char a[] = "hello bit!";
	printf("%d ", mystrlen(a));
	return 0;
}